⚡ setup

packages/nodes-base/nodes/Slack/GenericFunctions.ts

@@ -0,0 +1,77 @@
+import {
+	OptionsWithUri,
+ } from 'request';
+
+import {
+	IExecuteFunctions,
+	IExecuteSingleFunctions,
+	ILoadOptionsFunctions,
+} from 'n8n-core';
+import {
+	IDataObject
+ } from 'n8n-workflow';
+ import * as _ from 'lodash';
+
+export async function slackApiRequest(this: IExecuteFunctions | IExecuteSingleFunctions | ILoadOptionsFunctions, method: string, resource: string, body: object = {}, query: object = {}): Promise<any> { // tslint:disable-line:no-any
+	const authenticationMethod = this.getNodeParameter('authentication', 0, 'accessToken') as string;
+	const options: OptionsWithUri = {
+		method,
+		headers: {
+			'Content-Type': 'application/json; charset=utf-8'
+		},
+		body,
+		qs: query,
+		uri: `https://slack.com/api${resource}`,
+		json: true
+	};
+	if (Object.keys(body).length === 0) {
+		delete options.body;
+	}
+	if (Object.keys(query).length === 0) {
+		delete options.qs;
+	}
+	try {
+		if (authenticationMethod === 'accessToken') {
+			const credentials = this.getCredentials('slackApi');
+			if (credentials === undefined) {
+				throw new Error('No credentials got returned!');
+			}
+			options.headers!.Authorization = `Bearer ${credentials.accessToken}`;
+			//@ts-ignore
+			return await this.helpers.request(options);
+		} else {
+			//@ts-ignore
+			return await this.helpers.requestOAuth.call(this, 'slackOAuth2Api', options, 'bearer', 'authed_user.access_token');
+		}
+	} catch (error) {
+		if (error.statusCode === 401) {
+			// Return a clear error
+			throw new Error('The Slack credentials are not valid!');
+		}
+
+		if (error.response && error.response.body && error.response.body.message) {
+			// Try to return the error prettier
+			throw new Error(`Slack error response [${error.statusCode}]: ${error.response.body.message}`);
+		}
+
+		// If that data does not exist for some reason return the actual error
+		throw error;
+	}
+}
+
+export async function salckApiRequestAllItems(this: IExecuteFunctions | ILoadOptionsFunctions, propertyName: string ,method: string, endpoint: string, body: any = {}, query: IDataObject = {}): Promise<any> { // tslint:disable-line:no-any
+	const returnData: IDataObject[] = [];
+	let responseData;
+	do {
+		responseData = await slackApiRequest.call(this, method, endpoint, body, query);
+		query.cursor = encodeURIComponent(_.get(responseData, 'response_metadata.next_cursor'));
+		returnData.push.apply(returnData, responseData[propertyName]);
+	} while (
+		responseData.response_metadata !== undefined &&
+		responseData.response_metadata.mext_cursor !== undefined &&
+		responseData.response_metadata.next_cursor !== "" &&
+		responseData.response_metadata.next_cursor !== null
+	);
+
+	return returnData;
+}